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1 edition of Lopez Island ocean bottom seismometer intercomparison experiment found in the catalog.

Lopez Island ocean bottom seismometer intercomparison experiment

Lopez Island ocean bottom seismometer intercomparison experiment

final report

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  • 28 Currently reading

Published by Hawaii Institute of Geophysics, University of Hawaii in Honolulu .
Written in English

    Subjects:
  • Ocean bottom -- Washington (State) -- Lopez Island.,
  • Seismometers.

  • Edition Notes

    StatementG.H. Sutton ... [et al.]
    SeriesHIG -- 80-4, HIG (Series) -- 80-4.
    ContributionsSutton, George H., 1927-
    The Physical Object
    Pagination1 v. (various pagings) :
    ID Numbers
    Open LibraryOL21912777M

    1 Introduction [2] Ocean bottom seismometer (OBS) arrays have become powerful tools for studying the structure and dynamics of the oceanic crust and mantle. During typical OBS deployments, sensors are settled onto the seafloor through a free‐fall process, leading . This paper describes a high‐resolution seismic experiment designed to measure compressional and shear properties of the ocean bottom in the Lincoln Sea, north of Ellesmere Island, Canada. A three‐component ocean‐bottom seismometer (OBS) was deployed through 4 m of multiyear sea ice in m of water, and used to record broadband signals from explosive sources detonated on the .

      A video by Ernie Aaron of Scripps Institute of Oceanography shows the experience of an ocean bottom seismometer from deployment to recovery during the ENAM community seismic experiment. The Ocean Bottom Seismograph Instrument Pool (OBSIP). Qualitative aspects of seismograph/ocean bottom interaction M. Snoek and R. Herber Abstract: The parameters affecting the coupling of the Ocean Bottom Seismometer to the ground have bhen studied in a controlled experiment in the large seawater test pit .

    Quantifying the interaction of an ocean bottom seismometer with the seabed John C. Osler • and David M. F. Chapman Defence Research Establishment Atlantic, Dartmouth, Nova Scotia, Canada Abstract. A theory is presented for the coupling between an ocean bottom seismometer (OBS), the sediments upon which it rests, and the surrounding water.   Sutton et al., "Lopez Island Ocean Bottom Seismometer Intercomparison Experiment", HIGHawaii Institute of Geophysics, Honolulu, pp (). G. H. Sutton, et al., "An Overview and General Results of the Lopez Island OBS Experiment", Hawaii Institute of Geophysics Honolulu, pp.


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Lopez Island ocean bottom seismometer intercomparison experiment Download PDF EPUB FB2

Get this from a library. Lopez Island ocean bottom seismometer intercomparison experiment: final report.

[George H Sutton; Hawaii Institute of Geophysics.;]. The purpose of the Lopez Island Ocean Bottom Seismometer Intercomparison Experiment was to determine the effects of coupling and bottom currents on ocean bottom seismometers. Twelve operational OBS's, three specially designed three-component systems, and a hydrophone were compared with each other.

ABSTRACT The purpose of the Lopez Island Ocean Bottom Seismometer Intercomparison Experiment was to determine the effects of coupling and bottom currents on ocean bottom seismometers. First arrival compressional wave signals from an airgun source, as detected by a variety of seismometers in a shallow bay, are remarkably uniform.

However, minor variations in wavelet appearance Cited by: 2. The purpose of the experiment was to determine the effects of coupling and bottom currents on ocean bottom seismometers. ‘Lopez Island Ocean Bottom Seismometer Intercomparison Experiment’, Hawaii Institute of Geophysics Technical Report HIG, Hawaii Inst.

Geophys., Honolulu. Responses of an Ocean Bottom Seismometer Cited by: Direct comparison between signals recorded by a standard HIG configuration Pop-up Ocean Bottom Seismometer (POBS) and signals from the new Isolated Sensor Ocean Bottom Seismometer (ISOBS), deployed near each other in deep water, clearly demonstrates the advantages of.

The purpose of the Lopez Island Ocean Bottom Seismometer Intercomparison Experiment was to determine the effects of coupling and bottom currents on ocean bottom seismometers. The ROSE (Rivera Ocean Seismic Experiment) was a large seismic/ acoustic program conducted near the Clipperton Fracture Zone in Jan/Feb off the western coast of Mexico.

Ten oceanographic. A model representing the coupling of an ocean-bottom seismometer (OBS) to the seafloor as a mass-spring-dashpot system satisfactorily explains the results of transient tests performed on different instruments during the Lopez Island intercomparison test.

Lopez Island Ocean Bottom Seismometer Intercomparison Experiment. George H. Sutton, Brian T. Lewis, John Ewing, Frederick K. Duennebier, Brian T. Iwatake Abstract: The purpose of the Lopez Island Ocean Bottom Seismometer Intercomparison Experiment was to determine the effects of coupling and bottom currents on ocean bottom seismometers.

Ocean Bottom Seismometer. OBSs deployed at very local scales, arrays with apertures of only a few kilometers, may be used to monitor small cracking events (often with M. 0) in the vicinity of hydrothermal systems.

From: Encyclopedia of Ocean Sciences (Second Edition), Related terms. A method and apparatus for recording acoustical and seismic signals at the ocean bottom with minimal noise. A seafloor seismic recorder couples geophones to the water bottom, stores the seismic data, and is retrievable.

The device is comprised of a chassis, a ballast ring, an electronics control package, a geophone package, a buoy means, and a leg extension means. If a satisfactory horizontal component ocean bottom seismometer (OBS) is available, then sediment Qβ can be determined directly by using spectral ratios of converted shear-wave reflections.

Summary. Direct measurement of the sediment shear-wave quality factor, Qβ, has been hindered by the lack of an effective shear-wave source. We show that if a s. Summary. Two networks of four ocean-bottom seismographs were deployed successfully in September on spreading centre sites in the region of the Charlie—Gib.

An ocean-bottom seismometer (OBS) is a seismometer that is designed to record the earth motion under oceans and lakes from man-made sources and natural sources.

Sensors at the sea floor are used to observe acoustic and seismic events. Seismic and acoustic signals may be caused by different sources, by earthquakes and tremors as well as by artificial sources. Recognizing this problem, ONR sponsored the Lopez Island OBS intercomparison experiment (Sutton et al, and a).

This experiment produced a great deal of quantitative information and provided a considerable amount of insight on "Lopez Island ocean bottom seismometer intercomparison experiment final report to ONR," HIG, vol.Theory, testing, and use of ocean bottom seismic sensors show that the fidelity of data, particularly measurements of horizontal motion, can be severely distorted and noisy because of mechanical inte.

Lister, C.R.B. and B.T.R. Lewis () An ocean-bottom seismometer suitable for arrays. Deep-Sea An overview and general results of the Lopez Island OBS experiment. Marine Geophysical Researches 5: 3 Iwitake and J.D. Tuthill () Lopez Island ocean bottom seismometer intercomparison experiment.

Hawaii Institute of Geophysics Technical. Summary. Body waves from earthquake and explosive sources which were recorded by a three-component ocean bottom seismometer (OBS) in the Orozco transform fault.

The “cable-based” ocean-bottom seismographic system is composed of ocean-bottom seismometers (Photo 1), tsuna-mi sensors (Photo 2) and terminal equipment (Photo 3). The location and number of ocean-bottom seismometers and tsu-nami sensors are determined according to the purpose of the Photo 1 Ocean-bottom seismometer (JMA).DEEP-OCEAN SEISMOMETER IMPLANTATION SYSTEM Phase I Final Report 1.

K0lI6 30 to meters beneath the surface of the deep-ocean bottom. Seismometers deployed at these depths will be better coupled to the sediment and will be isolated from The Lopez Island OBS intercomparison experiment in showed.

The generalized spectra of ocean bottom seismic noise (broken curves without numbers) and the spectra of seismic noise recorded on (curve 1) and below (curves 6 and 7) the ocean bottom near Hole C in the North-west Pacific (Duennebier et al., ), as well as the spectra of seismic noise recorded on (curve 8) and below (curve 9) the ocean.